Rosanky, Texas is a small unincorporated community located in Bastrop County. The region experiences a humid subtropical climate characterized by hot summers and mild winters. Average high temperatures in the summer months range from the mid-90s to low 100s°F (35-38°C), while winter highs range from the 50s to 60s°F (10-16°C). The area receives around 35 inches of rainfall annually, with May being the wettest month.

Hydrology in Rosanky is primarily influenced by the Colorado River, which flows nearby. Additionally, the region is dotted with numerous small creeks and streams, contributing to the hydrological diversity.

Outdoor recreation opportunities abound in Rosanky and its surrounding areas. With its natural beauty and diverse landscapes, locals and visitors can enjoy activities such as hiking, biking, and camping in Bastrop State Park. The park offers scenic trails, picnic areas, and a swimming pool. The nearby Colorado River provides opportunities for boating, fishing, and kayaking. Nature enthusiasts can explore the diverse wildlife and birdwatch at the Buescher State Park. Overall, Rosanky offers a variety of outdoor recreational options for individuals who enjoy exploring nature and the great outdoors.